$(document).ready(function() {
	var control = $('#control');
	var fadeToHalfBtn = control.find('> input:eq(0)');
	var fadeToFullBtn = control.find('> input:eq(1)');
	var box = $('#wrapper #box');

	fadeToHalfBtn.click(function() {
		box.fadeTo(600, 0.5);
	});

	fadeToFullBtn.click(function() {
		box.fadeTo(600, 1); //0:안보인다, 1:보인다
	});
});